Internal-combustion engine



Oct. 30, 1923. Y HAWZAZfi A.P.BRUSH INTERNAL COMBUSTION ENGINE Filed April 1, 1920 Z Sheets-Sheet 1 A/anson PBrus/r 5% Wm WWW H gvwanto'z 0st. 30, 1923. mwmzfi A. P. BRUSH INTERNAL COMBUSTION ENGINE Filed April 1. 1920 2 Sheets-Sheet 2 \I 11 MP H H x y I J i g1 I 1 ll 'I'I M '1 T l M hmm W! WW If, however, the rod Patented Get. 3@, 1923.-

o as

ALANSON BRUSH, 035' DETROIT, MICHIGAN.

INTERNAL-COMBUSTION ENGINE.

Application filed April 1,

To all whom it my concern:

Be it known that I, ALANSON P. BRUSH, a citizen of the United States of America, residing at Detroit, in the county of Wayne and State f Michigan, have invented certain new and useful Improvements in Internal-Combustion Engines, of which the following is a. specification, reference being had therein to the accompanying drawings.

The invention relates to internal combustion engines of the valve-in-the-head type and the invention comprises the means employed for preventing temperature changes n the valve operating mechanism, which might interfere with the proper operation of the valves. It is a further object to provide a novel construction of breather for the engine crank case and with these objects in view the invention comprises the construction as hereinafter set forth.

In the drawings:

Figure 1 is a cross-section through a por- --tion of an engine, to which my improvements are applied;

Figure 2 is a sectional elevation in a plane at right angles to Figure l.

A is the engine cylinder, B the head thereof, C the valve in the head having the upwardly extending valve stem C, D the rocker lever above the head, and E the operating rod for said lever, which extends downward to the crank case and is connected with a roller F engaging the cam G. H is the engine crank case, which also encloses the cam shaft, and I is a case or cover for enclosing the rockers D and other mechanism above the engine head.

lVith the construction as thus far described, when the engine is in operation, heat from the engine is communicated to the mechanism within the crank case and als to the mechanism within the casing I. E which passes between the crank case and the casing I is exposed to the external atmosphere. it will be subject to varying temperatures. I have therefore provided means for maintaining the rod E under substantially constant temperature conditions and for utilizing this same means informing a breather for the engine crank case. Thus as shown, the rod E is enclosed within a tubular casing J, which extends from the bearing K on the crank case through a flange L on-the engine head and into communication with a chamber within the casing I. This tubular cas- 1920. Serial No. 370,615.-

ing J is in free communication. with the crank case through a port M in the bearing K, while the upper end of said tubular casing is in free communication with the interior of the casing I. The latter is provided on one side with louvers N so that there is free atmospheric communication between the interior and exterior. With the construction just described, when the engine is in operation, the displacement of air in the engine crank case due to the reciprocation of the pistons, will cause an alternate upward and downward movement of air through the tubular casing J and as the air thus displaced is first within the crank case, it will be at substantially the same temperature as said crank case. There fore, the temperature of the rod E will be maintained substantially constant during the operation of the engine while the upward and downward movement of the air through the casing J will form a breather connection for the crank case.

To secure the casing J in position and at the same time to permit of easily assembling and disassembling the parts, said casing is slipped downward over the rods E through the flange L and is seated in a counterbored recess K in the bearing K. There are a plurality of these tubes corresponding in number to thevalves of the engine and adjacent pairs of tubes are secured from displacement by keepers 0 secured by bolts P to the flange L and having their opposite ends engaging slots Q in the tubes.

What I claim as my invention is:

1. In an engine, the combination with a crank case, of'a valve operating rod extending upward from said crank case, a slide bearing for the rod on the crank ease ported to afford communication between the interior of the crank case and the atmosphere, and a tubular housing enclosing said rod and resting on the bearing and in atmospheric communication through the bearing with the interior of the crank case, whereby displaced warm air from said crank case surrounds said rod.

2. In an engine, the combination with a crank case. a valve operating rod extending upward from said crank case and a slide hearing for the rod forming communication between the casing interior and the atmosphere, of valve mechanism actuated by said rod on the engine head, a casing enclosing Kid said mechanism and ported for communication with the atmosphere, and a tubular housing enclosing said rod in atmospheric communication with said crank case through said slide bearing and with said casing on the head, forming a breather connection for said crank case, and a means for maintaining uniform temperature in said rod.

3. In an engine, the combination with a crank case, of a valve operating rod extending upward from said crank case, a tubular housing enclosing said rod, a bearing for said rod on said crank case forming a seat for said tubular housing and ported to establish communication between the interior of the crank case and the interior of said tube, said tube thereby constituting a breather connection for said crank case, and a means for protecting said rod from temperature changes.

4. In an engine, the combination with an engine block and crank case, of valve in the head, valve operating mechanism including a rocker lever above said head and an actuating rod extending downward into the crank case, a housing for enclosing the mechanism above said head, a flange on the block for supporting said housing and through an aperture in whica said rod passes, a tubular housing for enclosing said rod passing downward through the aperture in said flange and secured to said crank case, said tubular housing being in atmospheric communication with the crank case and forming a breather connection between the same and the housing above the head,

5. In an engine, the combination" with a crank case, a cam shaft therein, cam lifters operated by the cam shaft, slide hearings on the case for the lifters each ported to form communication betweent'he interior of the crank case and the atmosphere, a tappet rod extending from each lifter through the bearing and a tubular housing of greater inner diameter than the rod mounted on the hearing around each rod and forming an air jacket for the rod in communication through the bearings with the interior of the casing.

6. In an engine, the combination with an engine block and a crank case, of a valve in the head, a rocker lever on the head for the valve, a cam shaft in the crank case, a valve lifter operated by the cam shaft, a bearing on the crank case for the valve lifter provided with a port from the interior of the case, a tappet rod secured to the lifter, extending loosely through the duct of the bearing to the rocker lever, a casing inclosing the head with the valve and rocker lever, and a tubular housing that forms a communicating duct between the'air passage of the bearing and the head casing and is an air jacket for the rod which it encircles loosely.

7. In a valve in the head engine, a casing on the head over the valve mechanism inmnae provided with breather openings, a crank case and hollow members forming communicating ducts between the crank case and the head casing in which the valve mechanism operating members are housed.

8. In a valve in the head engine in which tappet rods operated by means within the crank case drive valve mechanism on the engine head, a casing on the engine head overthe valve mechanism having breather openings and members each sleeving a tappet rod and forming an air passage from the crankcase interior to the breather openings through the head casing.

9. In a valve in the head engine, a casing on the head over the valve mechanism provided with breather openings, a "crank case and hollow members non contacting with the cylinder walls and forming communicating duets between the crank case and the head casing in which the valve mechanism operating members are housed.

10. In a valve in the head engine in which tappet rods operated by means within the crank case extend to valve mechanism on the engine head which they drive, a casing on the engine head over the valve mechanism having breather openings and members in non-contact with the cylinder walls each sleeving a tappet rod and forming an air passage from the crank case interior to the breather openings through the head casing.

11. In a valve in the head engine in which tappet rods operated by means within the crank case, drive valve mechanism on the engine head, a casing on the engine head over the valve mechanism having breather openings, members extending into the housing and each sleeving a tappet rod and a slide bearing for each tappet rod provided with an air passage and arranged to form a fitting supporting a sleeving member, the bearing and member providing direct communication from the crank case to the breather openings through the head casing.

12. In an engine, a crank case, a head provided with a lateral flange, valve mecha nism on the head, a case over the head and valve mechanism resting on the flange, tappet rod hearings in the engine icrank case each provided with anair passage from the interior of the case. tappet rods in sliding engagement with the bearings extending through the air passages loosely and through the flange to the valve mechanism, and i101 low members extending from the slide bearings through the flange openings into the head casing, each forming an air jacket around a tappet rod and together with a companion bearing providing direct communication between the crank case interior and breather openings in the head casing throu h the latter.

13. n a valve in the head engine, the

combinationwith a crank case, a rocker.

lever above the head and an operating rod tion with the interior of said crank casing, for said lever extending Within the crank and a tubular casing surrounding said rod case, of a casing on the head over the rod and communicating with the ort in said N and rocker lever, said casing having breather bearing and the casing on the ead of said 5 openings therein, a bearing surrounding the en 'ne.

rod and extending into the crank case, said n testimony whereof I afiix m si nature. bearing having a port therein in communica- ALANSGN P. RfiJSH. 

